Attachment for saws



A. 0. SCHAEFER.

ATTACHMENT FOR SAWS.

APPLICATION mm Au s.2. 191s.

- Patented May 4, 1920,

' Fig-1 Hm- J Wu. I "1 I I E W mm? Mi;

' I INVENTOR daoifiiz Q/ScZaefer T ATTORNEY tion,

UNITED STATES PATENT OFFICE.

ADOLPI-IOTTO SCI-IAEFER, 0F BROOKLYN, NEW YORK, ASSIGNOR, BY MESNEASSIGN- MENTS, TO ATLANTIC SERVICE COMPANY,'INC., OF BROOKLYN, NEW YORK,A COR- PORATION OF YORK.

ATTACHMENT r'on SAWS.

Patented May 4, 1920;

Application filed August 2, 1918. Serial No. 247,937.

To all whom it may concern 7 Be it known that I, ADoLrH O. SGHAEFER, acitizen of the United States, and resident of Brooklyn, in the county ofKings and State of New York, have invented certain new and usefulImprovements in Attachments for Saws, of which the following is aspecification.

My invention relates to an improved attachmentfor saws, having referencemore particularly to saws intended for use in butcher shops and otherplaces where animal carcasses are cutup' and parceled out for publicuse.

An object of my invention is to provide an attachment which can be.aflixed to the frame carrying the blade of the saw, by means of whichthe handle may be quickly and conveniently mounted on said frame andfirmly secured thereto; and it is furthermore provided not onlythat thehandle can be applied to the saw more successfully in the firstinstance, but it may with equal facility be replaced if broken with theminimum expenditure of time and effort.

In this specification I disclose a preferred form or embodiment'of myinvention, but reserve the right to alter the construction which isactually shown and described herein, especially as regards the shape,size and arrangement of parts, to the full extent permitted by the scopeand spirit'of my invenin so far as the general meanings of the termsused in the appended claims define the same.

On the drawings,

Figure 1.is a side elevation of the frame and blade of a saw, with anembodiment of my attachment made fast to one end of the same;

Fig. 2 is a sectional view on the line 2-2 of Fig. 1

Fig, 3 is a view similar to Fig. 1, but illustrating also the handle ofthe saw engaging my attachment and made fast thereto; and

Fig. 1 is a top plan of what appears on Fig. 8;

Fig. 5 is' a detached view of an attachment interposed between the sawblade and the handle.

Having reference to the drawings, I show at 1 the frame of a saw,carrying a'blade 2.

This frame is of the usual shape. with its ends turned downward; andwith the blade 2 retained in place by having its extremities secured tothe down turned ends of the frame in any suitable manner, at the end towhich the handle 10 is to be applied the frame is provided with say, acouple of large openings 3, which give passage to the screws or otherrivets 11 by which the frame and the handle are to be held together.

My invention comprises as an essential element the attachment 4, whichmay be simplytwo pieces of metal or a single piece, having preferablythe shape or outline indicated particularly on Figs. 1 and 2, andsecured by riveting or otherwise to the end of the frame 1 in which theopenings 3 are located, rivets a being shown. Whenapplied to the frame"1, the two side plates constituting this attachment 4: engage thecorresponding sides of the frame. 1 The attachment 1' in the formillustrated may be of such shape that it extends the frame rearward atthe top; constituting a supporting surface, adjacent the curve of theframe where it extends downward to meet the blade 2. At this upperportion of the attachment 4L is provided registering openings .5 in thetwo side plates thereof, which are round holes drilled through the saidplates in alinement one with the other, and may 7 pass through the frame2 or not as most convenient, and are adapted to be brought into linewith the larger openings 3 in the frame 1. The openings 5 are thusprovided for the upper bolt of the handle which is to be made fast tothe saw by virtue of this attachment. As will be understood the two sideplates of the attachment 4 are of the same shape and occupy coincidentpositions when the attachment 4 and the frame are riveted to each other.

Below the openings 5 I provide both parts of the attachment 4 with slots6, so located that they will register with but eX- tend across .theopenings 3 in thelframe 1; that is, in each sideplate of the attachmentwill. be found as many pairs of oppositely disposed slots 6 as there areopenings 3; which slots 6 in width correspond to the size of the rivetbody 11, but in length equal the diameter of the openings 3, whosediameters shall be of predetermined largeness to accommodate thepossible variations in positions of the rivets 17 when two or more areemployed, as is almost invariably the practice. These slots 6 willtherefore in width correspond to the diameter of the openings 5 abovethem; and itois thus provided that when the handle is put on, the boltsor other fastening devices which it carries, can be passed through theopenings 5, the slots 6 in the attachment and the openings 3 in theframe 2 without difliculty.

When the handle 10 is aflixed to the saw as shown in Figs. 3 and 4:, therear end of the frame 1 carrying the attachment 1 is simply thrust intothe slot 12 of the handle and the uppermost bolt or screw 11 is passedthrough the openings 5 and made fast. The

remaining bolts of the handle can then easily be passed through thewider openings and the slots 6; and when all the bolts are tightened,the handle and the frame will be made rigid with each other. The bolts11 may have heads at one end andthreads at the other to receive anysuitable kind of nut v to enable them to serve their intended purpose.

The bolt in the handle which passes through the openings 5 engages theseopenings snugly and fills the same entirely. Hence, any tendency of thehandle 10 to move vertically upon the frame 1 is entirely providedagainst; while other bolts 11 similarly carried by the handle passingthrough the, slots 6 and openings 3 prevent the handle from turningabout the upper bolt allow the bolts. of the handle relating thereto topenetrate them after the attach- 'ment has been riveted to the frame andthe handle is ready to be put on. Of course the slots 6 in theattachment must be located so as to register with the openings 3 and befar enough from the rear edge of the attachment to allow the bolts ofthe handle to engage them properly and hold the handle securely andproperly in place in contact with the rear edge of the attachment. Bythis method, when the holes 3 are formed their location can be pickedmore or less by the eye of the operator; and in making the attachment4-, one is only required to get the holes 5 and the-slots 6 at theproper distance from the edge of the attachment 4 and have them ofsufficient widthwith respect to the diameter ,p of the screws 8. Theslots 6 may be of greater or less length, but they need not registerexactly with the openings 3; for so long as these slots and the openings3 permit the bolts of the handle to'go through from one side to theother after the properbolt of the handle passes through the openings 5the desired end is obtained. r

The attachment 4: forms in effectavery cheap mounting device thatenables the saw and the handle to be easily and readily assembled. Itshould be applied to the frame before the handle 10 is fitted on it; andthen in case it becomes desirable to replace the handle, a new one canbe affixed to the frame as quickly and effectively 1 as the originalhandle was mounted thereon.

If desired it is obviously practicable to make the attachment 4- in twoseparate pieces, but, as a matter of manufacture, it is preferable toform this part by bending so as to fit over the frame 1 and engage bothsides thereof in the general manner illus trated. When the attachment isthus formed out ofone piece of metal looped at the top as shown in thedrawings, the openings 5 will be inserted through the attachment asdescribed, either through theframe of the saw or only through the'two side walls of the attachment, as shown in Figs.

1 and 2.. Butif the side plates of theattachment are made in twoseparate plates,

they would not in that case need to extend over the saw frame top oreven up to the top portion. In either event the hole 5 would notpass'through the attachment at all, but through the frame of the sawalone.

ments of my invention in the same manner as if the hole were located inthe attachment, for the reason that the latter is rigidly fixed tothesawframe.

My improvement is illustrated in con' nection with the type of saw framewhich has the cutting blade attached as a separable member. While-thisform is the pre ferred application of my device, it obviously may beafliXed to a single saw blade, such for example as the familiar typeused by cabinet makers and joiners. 'Furthermore, it is desired toemploy'my improvement with other kinds of cutting tools, in which ahandle is attachable to a steel blade. a r 7 Having described myinvention, what I believe to be new, and desire to secure andprotect byLetters Patent of the United States is:

1. The combination with the frame ofv a saw having a blade aflixedthereto, said frame of hard steel and also having relatively largeopenings adjacent one end, of

. an attachment for the frame to be afiixed to said end, said attachmentof softer'metal having slots to be located adjacent said openings onboth sides of the frame,the

attachment being adapted to' permit'a V This would ofcourse fulfil therequire 7 handle to be secured to the frame by bolts extending throughsaid slots and said openings.

saw having a blade aflixed thereto, said frame made of hard'steel andhaving a pair of relatively large openings in one end, an attachment ofrelatively soft metal to be secured to the frame at said end and pro- 2.The combination with the frame of a" the frame on both blade, beingadapted to engage a handle for the saw to be secured in place byfastening devices extending through said blade and said attachment.

' 7 4. The combination With the blade of the saw having relatively largeopenings in one end, of an attachment for the frame to be affixed tosaid end, said attachment having slots to vbe'located adjacent saidopenings on both sides of said blade; the attachment being adapted tosecure a handle to said blade by bolts extending through said slots andsaid openings.

Signed at Brooklyn, in the county of Kings and State of New York this24th day of July, A. D. 1918.

YADOLPH OTTO SGHAEFERQ Witnesses:

HERBERT G. ANDREWS, WVALTER S. HIOKEY.

